Saturday

September 20, 2014

September 20, 2014

Posted by **Maggie** on Tuesday, December 4, 2012 at 2:29pm.

A car of maass 1330kg is traveling at 28m/s. The driverapplies the brakes to bring the car to a rest over a distance of 79m. Calculate the retarding force acting on the car.

From this i can see that it gives me the

Mass:1330kg

the inicial velocity: 28m/s

and the distance: 79m

i'm trying to find the force, but i can't think of a formula using the known variables!!

- Physics HELP! -
**Henry**, Thursday, December 6, 2012 at 9:40pmF = ma. We know m, now we need to find "a".

V^2 = Vo^2 + 2a*d

a = (V^2-Vo^2)/2d.

a = (0-784)/158 = -4.96 m/s^2.

F = 1330*(-4.96) = -6600 N.

**Answer this Question**

**Related Questions**

More Physics - I have NO idea how to do this! any help is great! A car with a ...

physics - Suppose a cars brakes can produce an acceleration of -7m/s^2. If the ...

Physics - A car mass of 1330 kg is traveling at 28.0 m/s. The driver applies the...

physics - A car of mass 1330 kg is traveling at 28.0 m/s. The driver applies the...

Physics - A 1000kg car is traveling along a level road at 20.00ms, when the ...

physics repost - A car of mass 1330 kg is traveling at 28.0 m/s. The driver ...

Physics - An automobile is traveling 65 km/hr. It brakes decelerate it 6.o m/s^2...

physics - a car is traveling at 40.0 m/s. the drivers sees an emergeny ahead and...

college Physics - A car is traveling at 7.0 m/s when the driver applies the ...

Physics - An 800-kg car traveling in a straight line at a speed of 30 m/s ...